Sound-box support for graphophones.



` Patented Mar. |2, 190|. c. BunKHART. SOUND BOX SUPPDRT FORGRAPHUPHUNES.

' (Applicatin med Apr. 4, 1900.)

(No Model.)

PHoTaLlTHn., WASmNGToN, n. c.

" ED STATES .PATENT SOUND-BOX SUPPORT FOR GRAPHOPHONES.

SPECIFICATION forming part of Letters Patent N o. 669,895, dated March12, 1901.

Application iled April 4, 1900.

To all whom it may con/cern.-

Beit known that I, CHARLES BURKHART, a citizen of the United States,residing at Altoona, in the county oflair and State of Pennsylvania,have invented a new and useful Sound-Box Support for Graphophones, ofwhich the following is a specification.

This invention relates to graphophones; and it has for its object toprovide a support for the sound-box which will hold the box to make topcontact of its stylus with the record in such manner that it may bereadily raised and lowered by the operation of the usual lifting-lug.

In the drawings forming a portion of this specification, and in whichlike numerals of reference indicate similar parts in the several views,Figure 1 is a side elevation showing a graphophone and illustrating theoperative positions ot' the record, the sound-box, and the presentattachment. Fig. 2 is a perspective view showing the attachment removedfrom the feed-carriage. Fig. 3 is a vertical central section takenthrough the supporting attachment. Fig. 4 is a detail perspective `viewshowing a modified form of the pivoted sound-tube which is adapted forengagement by the common form of sound-box. Fig. 5 is a longitudinalcentral section of the pivoted sound-tube and illustrating thedepressions in which the pivot-screws are engaged.

Referring now to the drawings, the soundbox support comprises a hollowupright or post 5, at the upper end of which is a transverse tubularhead 6, which lies at a right angle to the post, but which does notcommunicate with the interior of thepost. One end 7 of the head 6 isreduced in diameter to receive the end of the sound-funnel 7', which isengaged thereover in the usual manner or to receive the usual ear-tubes.

A short sound-tube 9 has a section 10 of a ball at one end,` theexterior diameter of which is approximately equal to the interiordiameter of the head 6, into which this ballsection is fitted withsufficientlooseness to permit the outer end of the short section to b'eraised and lowered. The ball is held against displacement from the head6 by means of pivot-screws 11, which are engaged with threadedperforations in the sides of the head, so that they may be screwedinwardly to Serial No. 11,508. (No model..l

engage their inner tapered ends with conical depressions 10' 11 atdiametrically opposite points of the ball-head of the short soundtube 9.Thus the outer end of the tube 9 may be raised and lowered tocorrespondinglymove the sound-box, the sound-tube 13 of which is slippedinto the outer end of the short tube 9 and is held therein by means of apin 14, which is engaged with alining perforations 13 and 14 in theshort tube 9 and the sound-tube 13, this pin 14 being of such length asnot to reach into the inclosure of the pivoted tube 9, and thus not tointerfere in any manner with the sound-waves passing therethrough. Itwill thus be seen that there is a clear passage for the sound-wavesthrough the parts from the box to the funnel.

At the lower end of the post 5 is an enlarged base 15, which isarc-shaped and is bifurcated, the resultant legs extending at both sidesof the post, as shown. The slot that forms the bifurcation is extendedthrough the lower end of the post 5, and in practice the post isdisposed with its arc-shaped base upon and receiving the upper portionof the feed-carriage, which latter is provided with a rounded portionwhich fits the base. The feed-carriage is carried by the usual screw 16,it being understood that the rotation of this screw feeds the carriage,and therewith the sound-box, along the record, the supporting attachmentbeing held in place upon the carriage by means of screws, which arepassed through perforations at the ends of the legs of the bifurcatedbase, said screws engaging threaded perforations in the carriage. Thecarriage carries a loose ring having a lug 18 at one side and afinger-piece 19 at the otherside, this ring lying with its upper portionin the slot which bifurcates the baseof the post 5 and with the lugprojecting between the legs of the base in the direction of the recordand with the finger-piece projecting between the legs of the base in anoutward direction for ready manipulation by the operator. In the usualconstruction when this inger-piece is depressed the lugis raised andacts to` raise the soundbox from the record, as shown in the patent toT. H. Macdonald, No. 579,595, granted March 30, 1897.

In order to provide for raising and lowering the sound-box when thefinger-piece is de- IOO pressed, a rod is disposed Within .the tubularpost 5, as shown at 20, and engaged with the ends of this rod arecylindrical blocks 21, which slidingly fit the post. At the inner sideof the post are formed two slots 22 and 23, which lie opposite to theblocks 21, and through these slots are passed two L-shaped rods or arms24 and 25, the upper arm having its outer end turned upwardly-andbifurcated to form a fork 26, which receives the short tube 9 outside ofthe head 6. The lower arm 25 has its outer end bentdownwardly to The rod20 and armsv lie against the lug 18. 24 and 25 have threaded engagementwith the blocks 21, so that they may be properly adjusted with respectto each other, and it will be seen that when the finger-piece isdepressed to raise the lug the arms and rod will be likewise raised andthe boX will be lifted, with its stylus, away from the record. Theliftingrod 2O and its parts, it will be seen, are carried by andsupported from the post 5, so that they form a part of the attachment,and thus when the post is putin place upon the graphephone the shiftingor lifting mechanism is brought into proper operative relation to thelifting-lug 18. Hence the attachment is complete in itself and afterbeing put in place it is only necessary to attach the sound-box and thefunnel or ear-tubes thereto to prepare the machine for operation.

The specific construction and arrangement shown and described may bemodified and any suitable materials and proportions may be used for thevarious parts Without departing from the spirit of the invention, theconstruction being essentially an attachment for holding the boX abovethe record and carrying the lifting mechanism.

When a sound-box having a cross-pin is used, the -pivoted tube 9 has itsouter end reduced in exterior diameter to fit into the free end of thetube of the box, and this reduced portion is slotted longitudinally toreceive the cross-pin in the usual manner.

What is claimed is- V 1. A sound-box support comprising a hollow post,atubular head at the upper end of the post and lying at right anglesthereto, a tube having an enlarged curvilinear end vmounted in one endof the head, a reciprocatory rod within the post, said pest having slotstherein, and arms passed through the slots and engaged with the rod, theupper arm having its outer end bent upwardly and engaged with thepivoted tube and the lower arm having its outer end bent downwardly forengagement to Ilift the rod and raise the pivoted tube.

2. An attachment for grap'hophones coinprisi-ng a supporting-post asound-tube pivotally connected with the post and adapted for theconnection of a sound-'box thereto, said post bei ug adapted for attachment to the feedcarriage of a graphophone, and a reciprocatory rodmounted in the post and having its ends projected therefrom andpositioned to engage said sound-tube and the lifting-lug of the carriagerespectively when the attachment is in operative posi-tion.

In testimony that I claim the foregoing as my own l have hereto affixedmy signature in the presence of two witnesses.

CHARLES BURKHART.

Witnesses:

W. T. SHIELDs, W. H. STEPHENS.

